CN110687360B - Signal detection band display active DTV digital television amplifier - Google Patents
Signal detection band display active DTV digital television amplifier Download PDFInfo
- Publication number
- CN110687360B CN110687360B CN201911030344.6A CN201911030344A CN110687360B CN 110687360 B CN110687360 B CN 110687360B CN 201911030344 A CN201911030344 A CN 201911030344A CN 110687360 B CN110687360 B CN 110687360B
- Authority
- CN
- China
- Prior art keywords
- triode
- signal
- capacitor
- stage
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 26
- 230000003321 amplification Effects 0.000 claims abstract description 10
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 10
- 239000003990 capacitor Substances 0.000 claims description 60
- 101100163833 Arabidopsis thaliana ARP6 gene Proteins 0.000 claims description 6
- 101100172705 Arabidopsis thaliana ESD4 gene Proteins 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
- H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/52—Automatic gain control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
- H04N7/102—Circuits therefor, e.g. noise reducers, equalisers, amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/294—Indexing scheme relating to amplifiers the amplifier being a low noise amplifier [LNA]
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Electromagnetism (AREA)
- Amplifiers (AREA)
Abstract
The invention provides a signal detection band display active DTV digital television amplifier, which is used for detecting the signal intensity of the position of an antenna when the antenna is placed and displaying the signal intensity at the same time of amplifying the signal, and is connected between the antenna and a coaxial cable terminal, and is characterized by comprising the following components: the device comprises a first-stage signal amplifying circuit, a second-stage signal amplifying circuit, a signal splitting circuit and a signal detecting circuit; the first-stage signal amplifying circuit is connected with an antenna and is used for carrying out first-stage amplification on the acquired antenna signals; the signal splitting circuit is used for splitting the antenna signal amplified by the first stage into two paths and distributing the two paths to the signal detection circuit and the second-stage signal amplifying circuit; the second-stage signal amplifying circuit is connected with the coaxial cable and is used for carrying out second-stage amplification on the antenna signal and outputting the antenna signal to the feeder coaxial cable; the signal detection circuit is connected to the singlechip and is used for feeding back the acquired antenna signals to the singlechip, and the singlechip is connected with a display screen to display the signal intensity in real time.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a signal detection active DTV digital television amplifier.
Background
The working principle of the existing common active DTV digital television antenna in the market is as follows: the antenna element transmits the received weak electromagnetic wave (including useful signal and interference signal) to an amplifier (LNA) for signal amplification via a coaxial cable. In this process, existing designs are unable to detect the intensity of the signal and cannot visually observe the signal.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a signal detection band display active DTV digital television amplifier, which aims to detect the signal intensity of the position of an antenna when the antenna is placed at the moment when the signal is amplified, and simultaneously display the signal intensity on a display screen, and the specific technical contents are as follows:
A signal detection band display active DTV digital television amplifier connected between an antenna and a coaxial cable termination, comprising: the device comprises a first-stage signal amplifying circuit, a second-stage signal amplifying circuit, a signal splitting circuit and a signal detecting circuit; the first-stage signal amplifying circuit is connected with an antenna and is used for carrying out first-stage amplification on the acquired antenna signals; the signal splitting circuit is used for splitting the antenna signal amplified by the first stage into two paths and distributing the two paths to the signal detection circuit and the second-stage signal amplifying circuit; the second-stage signal amplifying circuit is connected with the coaxial cable and is used for carrying out second-stage amplification on the antenna signal and outputting the antenna signal to the feeder coaxial cable; the signal detection circuit is connected to the singlechip and is used for feeding back the acquired antenna signals to the singlechip, and the singlechip is connected with a display screen to display the signal intensity in real time.
In one or more embodiments of the present invention, the signal splitting circuit includes two balun transformers, wherein primary sides of the two balun transformers are connected to the first-stage signal amplifying circuit, and secondary sides of the two balun transformers are respectively connected to the second-stage signal amplifying circuit and the signal detecting circuit.
In one or more embodiments of the present invention, the signal detection circuit includes a first amplifying unit, a second amplifying unit, and an output unit connected in sequence;
the first amplifying unit comprises resistors R4, R6 and R10, capacitors C10 and C11 and a triode U3; the resistor R10 and the resistor R6 are connected in series between a direct current source and the base electrode of the triode U3, the connection point of the resistor R10 and the resistor R6 is connected with the collector electrode of the triode U3, the resistor R4 is connected with the capacitor C10 in series and then connected with the two ends of the resistor R6, the base electrode of the triode U3 is connected with the capacitor C11 to serve as the input end of the first amplifying unit, and the collector electrode of the triode U3 serves as the output end of the first amplifying unit;
The second amplifying unit comprises resistors R11, R12 and R13, capacitors C13 and C16 and a triode U4; the resistor R111 and the resistor R12 are connected in series between a direct current source and the base electrode of the triode U4, the connection point of the resistor R11 and the resistor R12 is connected with the collector electrode of the triode U4, the resistor R13 is connected with the capacitor C116 in series and then connected with the two ends of the resistor R12, the base electrode of the triode U4 is connected with the capacitor C113 to serve as the input end of the second amplifying unit, and the collector electrode of the triode U4 serves as the output end of the second amplifying unit;
The output unit comprises a triode Q2, a diode D2, an inductor L6, a capacitor C14 and a capacitor C15, wherein the collector of the triode Q2 is connected to a direct current source, the collector is connected to the output end of the signal detection circuit, the base of the triode Q is connected with the inductor L6 and the capacitor C14, and the emitter of the triode Q is grounded; the anode of the diode D2 is connected to a dc source, the cathode thereof is connected to one end of the input side of the inductor L6, and one end of the output side of the inductor L6 is grounded via the capacitor C15.
In one or more embodiments of the present invention, the first stage signal amplifying circuit includes a triode U1, an inductor L1, capacitors C7, C8, C9 and C12, resistors R5, R8 and R9, and discharge tubes ESD1 and ESD2; the base of triode U1 connects capacitor C9 as the input, and its collecting electrode connects capacitor C7 as the output, inductance L1, resistance R9 and R8 connect gradually between DC source and triode U1's base in series, the tie point of resistance R9 and R8 is connected with triode U1's collecting electrode, resistance R5 connects in parallel in resistance R8 both ends after establishing ties with capacitor C8 again, inductance L1 is grounded by capacitor C12, discharge tube ESD1 respectively, triode U1's base is grounded by discharge tube ESD 2.
In one or more embodiments of the present invention, the second stage signal amplifying circuit includes a transistor U2, an inductor L4, capacitors C1, C2, C3 and C5, resistors R1, R2 and R3, and discharge tubes ESD3 and ESD4; the base of triode U2 connects capacitor C2 as the input, and its collecting electrode connects capacitor C1 as the output, inductance L1, resistance R1 and R2 connect gradually between DC source and triode U2's base in series, the tie point of resistance R1 and R2 is connected with triode U2's collecting electrode, resistance R3 connects in parallel in resistance R2 both ends after establishing ties with capacitor C3 again, inductance L4 is grounded by capacitor C5, discharge tube ESD4 respectively, triode U2's base is grounded by discharge tube ESD 3.
The beneficial effects of the invention are as follows: the signal detection circuit and the display circuit are added on the basis of the existing LNA amplifier, the strongest signal position of the antenna can be detected in the process, and the display technology is added to enable people to more intuitively see the amplified signal, so that the amplifier has stronger practicability and is suitable for various antennas and more convenient to use, and technicians can observe the antenna signal in real time conveniently and adjust the antenna signal.
Drawings
Fig. 1 is a schematic diagram of a body circuit of the present invention.
Fig. 2 is a schematic diagram of a first stage signal amplifying circuit according to the present invention.
Fig. 3 is a schematic diagram of a second stage signal amplifying circuit according to the present invention.
Fig. 4 is a schematic diagram of a signal splitting circuit according to the present invention.
Fig. 5 is a schematic diagram of a signal detection circuit according to the present invention.
Fig. 6 is a schematic diagram of a single chip and display circuit of the present invention.
Detailed Description
The scheme of the application is further described with reference to the accompanying figures 1 to 6:
A signal detection band display active DTV digital television amplifier connected between an antenna and a coaxial cable termination, comprising: a first-stage signal amplifying circuit 1, a second-stage signal amplifying circuit 2, a signal splitting circuit 3, and a signal detecting circuit 4; the first-stage signal amplification circuit 1 is connected with an antenna and is used for carrying out first-stage amplification on the acquired antenna signals; the signal splitting circuit 3 is used for splitting the antenna signal amplified by the first stage into two paths and distributing the two paths to the signal detection circuit 4 and the second-stage signal amplifying circuit 2; the second-stage signal amplifying circuit 2 is connected with a coaxial cable, and is used for performing second-stage amplification on the antenna signal and outputting the antenna signal to a feeder coaxial cable; the signal detection circuit 4 is connected to the singlechip and is used for feeding back the acquired antenna signals to the singlechip, and the singlechip is connected with a display screen to display the signal intensity in real time.
The signal shunt circuit 3 comprises two balun transformers, the primary side of each balun transformer is connected with the corresponding first-stage signal amplifying circuit, and the secondary side of each balun transformer is connected with the corresponding second-stage signal amplifying circuit and the corresponding signal detecting circuit.
The signal detection circuit 4 comprises a first amplifying unit, a second amplifying unit and an output unit which are sequentially connected; the first amplifying unit comprises resistors R4, R6 and R10, capacitors C10 and C11 and a triode U3; the resistor R10 and the resistor R6 are connected in series between a direct current source and the base electrode of the triode U3, the connection point of the resistor R10 and the resistor R6 is connected with the collector electrode of the triode U3, the resistor R4 is connected with the capacitor C10 in series and then connected with the two ends of the resistor R6, the base electrode of the triode U3 is connected with the capacitor C11 to serve as the input end of the first amplifying unit, and the collector electrode of the triode U3 serves as the output end of the first amplifying unit; the second amplifying unit comprises resistors R11, R12 and R13, capacitors C13 and C16 and a triode U4; the resistor R111 and the resistor R12 are connected in series between a direct current source and the base electrode of the triode U4, the connection point of the resistor R11 and the resistor R12 is connected with the collector electrode of the triode U4, the resistor R13 is connected with the capacitor C116 in series and then connected with the two ends of the resistor R12, the base electrode of the triode U4 is connected with the capacitor C113 to serve as the input end of the second amplifying unit, and the collector electrode of the triode U4 serves as the output end of the second amplifying unit; the output unit comprises a triode Q2, a diode D2, an inductor L6, a capacitor C14 and a capacitor C15, wherein the collector of the triode Q2 is connected to a direct current source, the collector is connected to the output end of the signal detection circuit, the base of the triode Q is connected with the inductor L6 and the capacitor C14, and the emitter of the triode Q is grounded; the anode of the diode D2 is connected to a dc source, the cathode thereof is connected to one end of the input side of the inductor L6, and one end of the output side of the inductor L6 is grounded via the capacitor C15.
The first-stage signal amplifying circuit 1 comprises a triode U1, an inductor L1, capacitors C7, C8, C9 and C12, resistors R5, R8 and R9, and discharge tubes ESD1 and ESD2; the base of triode U1 connects capacitor C9 as the input, and its collecting electrode connects capacitor C7 as the output, inductance L1, resistance R9 and R8 connect gradually between DC source and triode U1's base in series, the tie point of resistance R9 and R8 is connected with triode U1's collecting electrode, resistance R5 connects in parallel in resistance R8 both ends after establishing ties with capacitor C8 again, inductance L1 is grounded by capacitor C12, discharge tube ESD1 respectively, triode U1's base is grounded by discharge tube ESD 2.
The second-stage signal amplifying circuit 2 comprises a triode U2, an inductor L4, capacitors C1, C2, C3 and C5, resistors R1, R2 and R3, and discharge tubes ESD3 and ESD4; the base of triode U2 connects capacitor C2 as the input, and its collecting electrode connects capacitor C1 as the output, inductance L1, resistance R1 and R2 connect gradually between DC source and triode U2's base in series, the tie point of resistance R1 and R2 is connected with triode U2's collecting electrode, resistance R3 connects in parallel in resistance R2 both ends after establishing ties with capacitor C3 again, inductance L4 is grounded by capacitor C5, discharge tube ESD4 respectively, triode U2's base is grounded by discharge tube ESD 3.
In this embodiment, the first-stage signal amplifying circuit 1 and the second-stage signal amplifying circuit 2 adopt microwave band-pass amplifying chips with the model of BPF420 series, the singlechip adopts control chips with the model of SN8P2722 series, and the singlechip has timing function and records the working time of the DTV digital television. The singlechip samples the amplified signal to detect the voltage, converts the sampled voltage into a corresponding amplified multiple value, and then displays the amplified multiple value on a display screen, wherein the display adopts LCD segmented liquid crystal display, and the singlechip is used for direct driving display, and the driving mode is 1/4 Duty 1/3Bias.
The above-mentioned preferred embodiments should be regarded as illustrative examples of embodiments of the present application, and all such technical deductions, substitutions, improvements made on the basis of the same, similar or similar embodiments of the present application should be regarded as the protection scope of the present patent.
Claims (3)
1. A signal detection band display active DTV digital television amplifier connected between an antenna and a coaxial cable terminal, comprising: the device comprises a first-stage signal amplifying circuit, a second-stage signal amplifying circuit, a signal splitting circuit and a signal detecting circuit; the first-stage signal amplifying circuit is connected with an antenna and is used for carrying out first-stage amplification on the acquired antenna signals; the signal splitting circuit is used for splitting the antenna signal amplified by the first stage into two paths and distributing the two paths to the signal detection circuit and the second-stage signal amplifying circuit; the second-stage signal amplifying circuit is connected with the coaxial cable and is used for carrying out second-stage amplification on the antenna signal and outputting the antenna signal to the feeder coaxial cable; the signal detection circuit is connected to the singlechip and is used for feeding back the acquired antenna signals to the singlechip, and the singlechip is connected with a display screen to display the signal intensity in real time;
The signal shunt circuit comprises two balun transformers, the primary side of each balun transformer is connected with the corresponding first-stage signal amplifying circuit, and the secondary side of each balun transformer is connected with the corresponding second-stage signal amplifying circuit and the corresponding signal detecting circuit;
the signal detection circuit comprises a first amplifying unit, a second amplifying unit and an output unit which are sequentially connected;
the first amplifying unit comprises resistors R4, R6 and R10, capacitors C10 and C11 and a triode U3; the resistor R10 and the resistor R6 are connected in series between a direct current source and the base electrode of the triode U3, the connection point of the resistor R10 and the resistor R6 is connected with the collector electrode of the triode U3, the resistor R4 is connected with the capacitor C10 in series and then connected with the two ends of the resistor R6, the base electrode of the triode U3 is connected with the capacitor C11 to serve as the input end of the first amplifying unit, and the collector electrode of the triode U3 serves as the output end of the first amplifying unit;
The second amplifying unit comprises resistors R11, R12 and R13, capacitors C13 and C16 and a triode U4; the resistor R111 and the resistor R12 are connected in series between a direct current source and the base electrode of the triode U4, the connection point of the resistor R11 and the resistor R12 is connected with the collector electrode of the triode U4, the resistor R13 is connected with the capacitor C116 in series and then connected with the two ends of the resistor R12, the base electrode of the triode U4 is connected with the capacitor C113 to serve as the input end of the second amplifying unit, and the collector electrode of the triode U4 serves as the output end of the second amplifying unit;
The output unit comprises a triode Q2, a diode D2, an inductor L6, a capacitor C14 and a capacitor C15, wherein the collector of the triode Q2 is connected to a direct current source, the collector is connected to the output end of the signal detection circuit, the base of the triode Q is connected with the inductor L6 and the capacitor C14, and the emitter of the triode Q is grounded; the anode of the diode D2 is connected to a dc source, the cathode thereof is connected to one end of the input side of the inductor L6, and one end of the output side of the inductor L6 is grounded via the capacitor C15.
2. The signal detection zone display active DTV digital television amplifier of claim 1, wherein: the first-stage signal amplifying circuit comprises a triode U1, an inductor L1, capacitors C7, C8, C9 and C12, resistors R5, R8 and R9, and discharge tubes ESD1 and ESD2; the base of triode U1 connects capacitor C9 as the input, and its collecting electrode connects capacitor C7 as the output, inductance L1, resistance R9 and R8 connect gradually between DC source and triode U1's base in series, the tie point of resistance R9 and R8 is connected with triode U1's collecting electrode, resistance R5 connects in parallel in resistance R8 both ends after establishing ties with capacitor C8 again, inductance L1 is grounded by capacitor C12, discharge tube ESD1 respectively, triode U1's base is grounded by discharge tube ESD 2.
3. The signal detection zone display active DTV digital television amplifier of claim 1, wherein: the second-stage signal amplifying circuit comprises a triode U2, an inductor L4, capacitors C1, C2, C3 and C5, resistors R1, R2 and R3, and discharge tubes ESD3 and ESD4; the base of triode U2 connects capacitor C2 as the input, and its collecting electrode connects capacitor C1 as the output, inductance L1, resistance R1 and R2 connect gradually between DC source and triode U2's base in series, the tie point of resistance R1 and R2 is connected with triode U2's collecting electrode, resistance R3 connects in parallel in resistance R2 both ends after establishing ties with capacitor C3 again, inductance L4 is grounded by capacitor C5, discharge tube ESD4 respectively, triode U2's base is grounded by discharge tube ESD 3.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911030344.6A CN110687360B (en) | 2019-10-28 | 2019-10-28 | Signal detection band display active DTV digital television amplifier |
| PCT/CN2019/120239 WO2021082121A1 (en) | 2019-10-28 | 2019-11-22 | Signal detection band display active dtv digital television amplifier |
| DE212019000208.0U DE212019000208U1 (en) | 2019-10-28 | 2019-11-22 | Amplifier for digital cable television with an improved structure for signal detection and display |
| US16/970,299 US11356067B2 (en) | 2019-10-28 | 2019-11-22 | Active digital television (DTV) amplifier with signal detection and display functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911030344.6A CN110687360B (en) | 2019-10-28 | 2019-10-28 | Signal detection band display active DTV digital television amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110687360A CN110687360A (en) | 2020-01-14 |
| CN110687360B true CN110687360B (en) | 2024-10-15 |
Family
ID=69114216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911030344.6A Active CN110687360B (en) | 2019-10-28 | 2019-10-28 | Signal detection band display active DTV digital television amplifier |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US11356067B2 (en) |
| CN (1) | CN110687360B (en) |
| WO (1) | WO2021082121A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104467970A (en) * | 2014-11-28 | 2015-03-25 | 北京邮电大学 | Conversion device and method for transmitting signals in mixed mode |
| CN206077572U (en) * | 2016-09-23 | 2017-04-05 | 东莞市百傲电子科技有限公司 | A kind of active DTV DTVs amplifier of anti-tampering 4G frequencies |
| CN108322735A (en) * | 2018-01-31 | 2018-07-24 | 四川长虹电器股份有限公司 | A kind of DVB-C television Signal Monitoring Systems |
| CN211318603U (en) * | 2019-10-28 | 2020-08-21 | 江西创新科技有限公司 | Signal detection active DTV digital television amplifier with display |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07226631A (en) * | 1994-02-16 | 1995-08-22 | Ricoh Co Ltd | Optical signal detection circuit |
| GB2303264A (en) * | 1995-07-10 | 1997-02-12 | Wai Leung Chan | An aerial booster amplifier with remotely controlled gain |
| KR0170345B1 (en) * | 1996-06-11 | 1999-03-20 | 김광호 | Auto-gain control circuit and method of hdtv receiver |
| JPH10322170A (en) * | 1997-05-15 | 1998-12-04 | Sony Corp | Receiving device |
| JP3424660B2 (en) * | 2000-06-13 | 2003-07-07 | 株式会社関電工 | Method of constructing TV reception, Internet connection and premises LAN system using existing TV common reception facilities |
| US7133082B2 (en) * | 2001-01-09 | 2006-11-07 | Allen Le Roy Limberg | Digital television receiver with remote tuner for driving transmission line with intermediate-frequency signal |
| DE10251203B3 (en) * | 2002-11-04 | 2004-08-19 | Harman Becker Automotive Systems (Becker Division) Gmbh | Method and circuit arrangement for feeding an input signal into n receivers |
| JP2004214939A (en) * | 2002-12-27 | 2004-07-29 | Maspro Denkoh Corp | Amplifier for tv reception |
| JP2006332770A (en) * | 2005-05-23 | 2006-12-07 | Alps Electric Co Ltd | On-vehicle receiver |
| CN101191413B (en) * | 2006-11-22 | 2011-02-02 | 中国海洋石油总公司 | High speed transmission method for down hole digital television data and transmission system thereof |
| CN101394508A (en) * | 2007-09-19 | 2009-03-25 | 深圳Tcl新技术有限公司 | Television set having source input state display function |
| US8923168B2 (en) * | 2010-06-03 | 2014-12-30 | Broadcom Corporation | Front end module with an antenna tuning unit |
| KR101860739B1 (en) * | 2011-05-18 | 2018-05-25 | 삼성디스플레이 주식회사 | Supply voltage converter, display device including the same and method of controlling driving voltage |
| CN102570032A (en) * | 2011-12-31 | 2012-07-11 | 杨瑞雄 | System for controlling rotation of antenna through coaxial cable and control method of system |
| CN202871967U (en) * | 2012-07-25 | 2013-04-10 | 大通电子股份有限公司 | Rhombic digital television terrestrial broadcasting reception antenna apparatus |
| CN103220570B (en) * | 2013-05-14 | 2016-01-06 | 海安常大技术转移中心有限公司 | The terminal that receiving digital television signal carrying out is play |
| CN104301583A (en) * | 2013-07-19 | 2015-01-21 | 深圳市同洲电子股份有限公司 | Automatic loop-out signal adjusting method and system |
| US11280885B2 (en) * | 2016-11-01 | 2022-03-22 | America as represented by the Secretary of the Army | LADAR receiver |
| US10444330B2 (en) * | 2016-11-01 | 2019-10-15 | The United States Of America As Represented By The Secretary Of The Army | LADAR receiver with enhanced signal to noise ratio and method |
-
2019
- 2019-10-28 CN CN201911030344.6A patent/CN110687360B/en active Active
- 2019-11-22 WO PCT/CN2019/120239 patent/WO2021082121A1/en active Application Filing
- 2019-11-22 US US16/970,299 patent/US11356067B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104467970A (en) * | 2014-11-28 | 2015-03-25 | 北京邮电大学 | Conversion device and method for transmitting signals in mixed mode |
| CN206077572U (en) * | 2016-09-23 | 2017-04-05 | 东莞市百傲电子科技有限公司 | A kind of active DTV DTVs amplifier of anti-tampering 4G frequencies |
| CN108322735A (en) * | 2018-01-31 | 2018-07-24 | 四川长虹电器股份有限公司 | A kind of DVB-C television Signal Monitoring Systems |
| CN211318603U (en) * | 2019-10-28 | 2020-08-21 | 江西创新科技有限公司 | Signal detection active DTV digital television amplifier with display |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110687360A (en) | 2020-01-14 |
| US11356067B2 (en) | 2022-06-07 |
| WO2021082121A1 (en) | 2021-05-06 |
| US20210367565A1 (en) | 2021-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103929154B (en) | Picosecond monocycle impulse transmitter | |
| CN109375176A (en) | A kind of power amplifier in transmitter module | |
| CN211318603U (en) | Signal detection active DTV digital television amplifier with display | |
| CN110687360B (en) | Signal detection band display active DTV digital television amplifier | |
| CN110380744A (en) | A kind of construction site management of fire safety system based on Internet of Things | |
| CN206350001U (en) | Super low-power consumption circuit for intelligent garbage bin | |
| CN104779629B (en) | Wireless communication control system for the capacitor compensation cabinet in power transmission network | |
| CN204131470U (en) | A kind of shortwave 4W power amplifier | |
| CN110504931A (en) | A kind of computer network signal transmission amplifying circuit | |
| CN207283502U (en) | A kind of Big Dipper gps antenna amplifying circuit | |
| CN110572533B (en) | Electrodeless adjustable band display time-consuming DTV digital television amplifier | |
| CN210958456U (en) | Stepless adjustable active DTV digital television amplifier with display timing | |
| CN109257053A (en) | A kind of network signal enhancement device | |
| CN109257119B (en) | Radio monitoring antenna system suitable for different radio frequency signal frequency bands | |
| CN209017019U (en) | Network signal enhancement device | |
| CN209462345U (en) | A kind of timing timing bracelet | |
| CN209046597U (en) | Radio-frequency power amplifier ON-OFF control circuit, radio-frequency front-end transmitting link and receives link | |
| CN214851226U (en) | Wireless communication circuit and NFC device | |
| CN208227005U (en) | A kind of High Linear low noise short-wave all-frequency band monitoring array received front end | |
| CN103475864A (en) | Video image sending circuit | |
| CN201302597Y (en) | Circuit for apparatus failure detection of Doherty power amplifier | |
| CN206595904U (en) | A kind of waveform conversion signal process circuit | |
| CN106803867B (en) | A kind of constant current high-definition image signal processing system based on electromagnetism Dolby circuit | |
| CN110177178B (en) | Fire-fighting telephone host voice communication circuit and implementation method | |
| CN202455281U (en) | Constant-power output power supply device for measuring and controlling front-end power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |